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2117 Aluminum vs. EN 1.3551 Steel

2117 aluminum belongs to the aluminum alloys classification, while EN 1.3551 steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 2117 aluminum and the bottom bar is EN 1.3551 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
220
Elastic (Young's, Tensile) Modulus, GPa 71
190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
75
Tensile Strength: Ultimate (UTS), MPa 300
720

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Maximum Temperature: Mechanical, °C 220
530
Melting Completion (Liquidus), °C 650
1490
Melting Onset (Solidus), °C 550
1450
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 150
36
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
8.6
Electrical Conductivity: Equal Weight (Specific), % IACS 120
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.2
4.9
Embodied Energy, MJ/kg 150
71
Embodied Water, L/kg 1150
82

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 28
26
Strength to Weight: Bending, points 33
23
Thermal Diffusivity, mm2/s 59
9.8
Thermal Shock Resistance, points 12
21

Alloy Composition

Aluminum (Al), % 91 to 97.6
0
Carbon (C), % 0
0.77 to 0.85
Chromium (Cr), % 0 to 0.1
3.9 to 4.3
Copper (Cu), % 2.2 to 4.5
0 to 0.3
Iron (Fe), % 0 to 0.7
88.8 to 91.1
Magnesium (Mg), % 0.2 to 1.0
0
Manganese (Mn), % 0.4 to 1.0
0.15 to 0.35
Molybdenum (Mo), % 0
4.0 to 4.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0.2 to 0.8
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.25
0
Tungsten (W), % 0
0 to 0.25
Vanadium (V), % 0
0.9 to 1.1
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.25
0
Residuals, % 0 to 0.15
0